CryptoCompare · Authentication Profile

Cryptocompare Authentication

Authentication

CryptoCompare secures its APIs with apiKey and oauth2 across 3 declared security schemes, as derived from its OpenAPI definitions. OAuth 2.0 is offered via the authorizationCode flow(s).

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Methods: apiKey, oauth2 Schemes: 3 OAuth flows: authorizationCode API key in: header, query

Security Schemes

apiKeyQuery apiKey

· in: query (api_key)

apiKeyHeader apiKey

· in: header (Authorization)

mcpOAuth oauth2

· flows: authorizationCode

Source

Authentication Profile

generated: '2026-07-22'
method: searched
source: openapi/cryptocompare-*-openapi.yml + https://mcp.coindesk.com/.well-known/oauth-authorization-server + live 401 probes
docs: https://developers.coindesk.com/documentation/data-api/introduction
summary:
  types:
  - apiKey
  - oauth2
  api_key_in:
  - header
  - query
  oauth2_flows:
  - authorizationCode
schemes:
- name: apiKeyQuery
  type: apiKey
  in: query
  parameter: api_key
  description: API key supplied as the api_key query parameter.
  sources:
  - openapi/_original/cryptocompare-data-api-openapi.yml
  - openapi/_original/cryptocompare-min-api-openapi.yml
- name: apiKeyHeader
  type: apiKey
  in: header
  parameter: Authorization
  description: 'API key supplied as `Authorization: Apikey {apiKey}`.'
  sources:
  - openapi/_original/cryptocompare-data-api-openapi.yml
  - openapi/_original/cryptocompare-min-api-openapi.yml
- name: mcpOAuth
  type: oauth2
  description: >-
    OAuth 2.0 authorization code + PKCE (S256) with dynamic client registration,
    used only by the official MCP server at https://mcp.coindesk.com/mcp — it
    wraps the user's CoinDesk Data API key, which is stored encrypted. No scopes
    (scopes_supported is empty).
  flows:
  - flow: authorizationCode
    authorizationUrl: https://mcp.coindesk.com/authorize
    tokenUrl: https://mcp.coindesk.com/token
  sources:
  - well-known/cryptocompare-oauth-authorization-server.json
notes: >-
  Since 2026-05-21 the free tier is retired: every request without a key under an
  active subscription returns HTTP 401 with Err.type 2 "API key required"
  (verified live 2026-07-22 on both min-api and data-api). Keys are managed in the
  developers.coindesk.com dashboard.

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